Press the Digital Crown to open the apps list
Tap the Alarms app
Tap Add Alarm
Turn the Digital Crown to set the hour and minute
Tap AM or PM if needed
Tap Set or Save
To edit an alarm, tap it and adjust the time
To turn an alarm on or off, tap the switch next to it
To delete an alarm, swipe left on it and tap Delete
To set Siri, say “Set an alarm for [time]”